Bug Tracker item #2820558, was opened at 2009-07-13 05:47
Message generated for change (Comment added) made by sbajic
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>Category: daemon
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Dean Takemori (deantakemori)
>Assigned to: Stevan Bajic (sbajic)
Summary: Another hash_drv bug
Initial Comment:
in _ds_get_signature():
if (fread(SIG->data, statbuf.st_size, 1, file) != statbuf.st_size) {
But man fread says:
fread() and fwrite() return the number of items successfully read or
written (i.e., not the number of characters). If an error occurs, or
the end-of-file is reached, the return value is a short item count (or
zero).
so the test should be < 1
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>Comment By: Stevan Bajic (sbajic)
Date: 2009-07-14 01:28
Message:
Hallo Dean
The 3th parameter for fread is used as count. So if statbuf.st_size * 1 is
not equal to the return value of fread then the file was not read
completely. statbuf.st_size is computed by using the stat syscall. Assuming
the file read by fread has 1024 bytes then fread should return 1024 as
result and 1024 * 1 = 1024 and every thing is fine. If fread returns -1 or
any other number not being 1024 then the fread was not successful and DSPAM
will bark about it. So how is that logic supposed to be wrong? Can you post
some examples where that if condition is triggering a bug?
Kind Regards
Stevan Bajic
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